body, html
  line-height : 1
  font-weight : 200
  font-family : 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light', arial ,sans-serif

.clearfix
  display: inline-block
  &:after
    display :block
    content: "."
    height:0
    line-height : 0
    clear: both
    visibility : hidden

@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
  .border-1px
    &::after,&::before
      -webkit-transform : scaleY(0.7)
      transform : scaleY(0.7)

@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
  .border-1px
    &::after,&::before
      -webkit-transform : scaleY(0.5)
      transform : scaleY(0.5)
